## Summary
User search can now resolve exact `email:` and `username:` terms through
`GET /api/v2/users` instead of only supporting fuzzy free-text matches.
The database query already had exact email and username filters; this
wires the public search parser and API handler to those filters so
clients can ask for a single user by email without fetching every user
or depending on substring matching.
This is the API half of coder/terraform-provider-coderd#403: that
provider PR adds `data.coderd_user.email`, and this PR gives it an
efficient exact lookup path.
## Testing
- `go test ./coderd/searchquery -run '^TestSearchUsers$' -count=1`
- `go test ./coderd -run '^TestGetUsersFilter$' -count=1`
- Live API test:
- Built local enterprise Coder from this branch.
- Started Coder on `http://127.0.0.1:39991` against a clean Postgres
database.
- Created `lookup-target@example.com`.
- Verified `GET /api/v2/users?q=email:LOOKUP-TARGET@EXAMPLE.COM&limit=2`
returned exactly one user:
```json
{
"count": 1,
"users": [
{
"id": "efc6f909-ce0a-4731-bd2f-6e4df417aaa7",
"username": "lookup-target",
"email": "lookup-target@example.com"
}
]
}
```
---
---------
Co-authored-by: Ethan Dickson <ethanndickson@gmail.com>
